"I'd say that the least important thing they need to know is how to use a pistol, and that surprises a lot of people," said 88 Tactical instructor Trevor Thrasher.

Thrasher said they not only teach how to use a gun, but also when it's legal to do so. He said 88 Tactical got nearly 40 emails on Friday after the movie theater shooting from people interested in carrying a concealed weapon.

"People recognize that they're vulnerable to this type of attack and they want to seek the means to do something about it," Thrasher said.

Not everyone looks at the movie theater massacre and thinks about buying a gun. Some have just the opposite reaction.

"I think we need better gun control in this country, because I don't think a person should have been able to buy that much ammunition without people realizing that he had that much," Shelly Anderson said.

Currently in Nebraska, more than 16,000 people are certified to carry a concealed weapon. The course required to do so is 10 hours long and includes both classroom work and time on the shooting range. Anyone wishing to take the course must first undergo a background check and get certified through the Sheriff's Office.